Flush-Mounted Pressure and Level Transmitter PZT 100/101 Hengesbach

The pressure transmitters PZT are applicable for pressure and level measurements in pipes and vessels. The modular process connection system offers a huge variety of connection adapters and adds a sustainable cost reduction. The flush mounted process connection with its sealing cone free of elastomers and its stainless steel membrane is certified by EHEDG, type EL-CLASS I and hence applicable for measurements with highest hygienic requirements.

The vacuum tight measuring cell with stainless steel membrane works with the piezoresistive measuring principle. The pressure transmitters PZT are designed for measuring ranges of -1/0...0,35bar up to -1/0...100bar. Special measuring ranges are also available. Due to the construction for permanent temperatures up to 125°C or 200°C respectively the transmitter are CIP and SIP cleanable. In addition the high protection classes IP67 and IP69K allow an accurate outside cleaning with foam and power washer and prevent the permeation of humidity into the instrument. As an additional protection against humidity the electronics in the housing are completely casted.

All the pressure transmitters in series 100/101 are designed for universal applications and, in particular, for applications with constantly high temperatures of up to 200°C. Furthermore, using the on-site display with series 100 and the display and operating module OPUSM in series 101, the pressure transmitters can be simply read out, configured and diagnosed.


  • modular process connection system with sealing cone free of elastomers
  • precise measurements ≤ ± 0,15% FS
  • Turn Down 10
  • integrated onsite display or external operating module OPUSM for parametrisation and display of measured values
  • high protection classes IP 67 and IP69K
  • vacuum tight measuring cell
  • application strengths: content and process pressure measurements / vacuum measurements even at high temperatures


General inforamtion

Device type/measuring principlePIEZOTEC PZT 100/101/: piezoresistive   


measuring ranges  PZT 100/101   
standard-range [bar]relative OSD absolute OSD
OSD=Over Load Safety [bar]0...0,35 1    
 0...1 3 0...1 3
 -1/0...2,5 8 0...2,5 8
 -1/0...5 15 0...5 15
 -1/0...10 30 0...10 30
all measuring cells are vacuum tight-1/0...30 90 0...30 90
 -1/0...100 250 0...100 250
setting of measuring rangesvia keybord of the onsitedisplay / operating modul OPUSM   
adjustable rangesmeasuring start zero:0.....90%   of the sensor range  TD=10
 measuring range span:10...100%  of the sensor range  
bursting pressure acc. to DIN16086≥ 4x sensor range     


output signal2-wire:   4...20mA with test circuit connection inside the device 
breakdown signaloptionally: 3,8mA, 22mA, hold (hold the last measuring)   
current limit3,85mA and 21,5mA (standard operation)   
integration timt0...300s infinitly variable (respone time after pressure jump)   

Measuring accuracy

reference conditionsacc. to DIN IEC 770     
linearity, hysteresis and repeatybility acc. to limit point-method DIN IEC 770≤ ± 0,15% to the sensor range   
warm-up time< 5s (device is self-testing)     
adjustment time (without damp)< 200ms     
long term drift≤ 0,2% FS per year     
thermical hysteresis≤ ± 0,2% of the sensor range / 10K (-20...+80°C) form 4bar (PZT) 
 ≤ ± 0,3% of the sensor range / 10K (-20...+80°C) up to 0,6bar (PZT) 

Operating conditions

installation- / calibration-positionany / vertical (position-depending zero drift)   
media temperatureT1: -40...+125°C (140°C max. 1h)   
 T2: -40...+200°C (high temperature construction)   
ambience- / storage temperaturetype 101: -40...+85°C     
 type 100: -30...+75°C     
 (under -20°C is an increased risk of cable breaks / the display may have limited functions) 
protection class acc. to EN60529IP 67 and IP 69K     
electromagnetic compatibilitysusceptibility: acc. to DIN IEC 61000-6-2   
 spurious radiation:  acc. to DIN IEC 61000-6-4   


electrical connection- standard: cable gland M16x1,5 nickel-plated brass (stainless steel on request) 
 - optional: round plug M12x1 nickel-plated brass(stainless steel on request) 
 - optional: angle plug gemäß EN 175301-803   
 - optional: reference cable     
process connection- membrane flush mounted welded, CrNiSt (other on request)   
 - lock-screw M38x1,5 and sealing cone free of elastomers   
 - sealing EPM (FDA) (temperature range: -20...+150°C)   
 - sealing FPM (FDA) (temperature range: -40...+200°C)   
materials- fieldhousing / cap: CrNiSt 1.4301 (304)    
 - housing seal: FPM (Viton®)    
 - pressure equalization:Polyamid    
 - window (type 100):Polycarbonat    
 - process-connection / connection-adapters:CrNiSt 1.4404 (316L)    
 - process-membrane:CrNiSt 1.4435/1.4404 (316L)    
 - screw (type 101): CrNiSt 1.4301 (304)    
 - reference cable: 5-wire with reference-tube:PUR (recommendation: max. 80m)    
filling liquids- silicone-oil (FDA)      

Display and operation

displayLCD, 4-digit numerical and 5-digit alphanumerical    
 type 100:integrated on-site-display (not removable from the device)    
 type 101:external display and operating modul OPUSM    
displayable unitspressure:mbar, bar, psi, Pa, mH2O, mmHg, Torr, atm, at, kg/cm²    
 temperature:°C, °F, K, °R, °Ré     
additional unitsoutput current in mA or % (based on span)     
operation100:00:00via configurationmenu with integrated on-site-display    
 101:00:00via configurationmenu with external display and operating modul OPUSM    

Power supply

power supply/burden12-36V DC, max. burden: (Vsupply – 12V) / 24mA    
Accessories series 100       
display and operating modul OPUSMexternal display and operating modul, CrNiSt, IP 67, 41x70mm, 1m connection cable and round plug    
 certificate of conformitation     
 material certificate acc. to EN 10204     



Download Data Sheet: Flush-Mounted Pressure and Level Transmitter PZT 100/101

Ref: Hengesbach.com